var swfu;
     
window.onload = function () {
    var settings_object = {//定义参数配置对象
        upload_url : "http://www.swfupload.org/upload.php",
            flash_url : "http://www.swfupload.org/swfupload.swf",
            file_post_name : "Filedata",
            post_params : {
           "post_param_name_1" : "post_param_value_1",
           "post_param_name_2" : "post_param_value_2",
           "post_param_name_n" : "post_param_value_n"
            },
            use_query_string : false,
            requeue_on_error : false,
            http_success : [201, 202],
            assume_success_timeout : 0,
            file_types : "*.jpg;*.gif",
            file_types_description: "Web Image Files",
            file_size_limit : "1024",
            file_upload_limit : 10,
            file_queue_limit : 2,
 
            debug : false,
     
            prevent_swf_caching : false,
            preserve_relative_urls : false,
     
            button_placeholder_id : "element_id",
            button_image_url : "http://www.swfupload.org/button_sprite.png",
            button_width : 61,
            button_height : 22,
            button_text : "<b>Click</b> <span class="+redText+">here</span>",
            button_text_style : ".redText { color: #FF0000; }",
            button_text_left_padding : 3,
            button_text_top_padding : 2,
            button_action : SWFUpload.BUTTON_ACTION.SELECT_FILES,
            button_disabled : false,
            button_cursor : SWFUpload.CURSOR.HAND,
            button_window_mode : SWFUpload.WINDOW_MODE.TRANSPARENT,
     
            swfupload_loaded_handler : swfupload_loaded_function,
            file_dialog_start_handler : file_dialog_start_function,
            file_queued_handler : file_queued_function,
            file_queue_error_handler : file_queue_error_function,
            file_dialog_complete_handler : file_dialog_complete_function,
            upload_start_handler : upload_start_function,
            upload_progress_handler : upload_progress_function,
            upload_error_handler : upload_error_function,
            upload_success_handler : upload_success_function,
            upload_complete_handler : upload_complete_function,
            debug_handler : debug_function,
    };
     
    swfu = new SWFUpload(settings_object);//实例化一个SWFUpload，传入参数配置对象
};
/*定义各种事件监听函数*/
function swfupload_loaded_function(){}
function file_dialog_start_function(){}